CN103674429B - A kind of measurement flexible hollow shaft static-unbalance method - Google Patents
A kind of measurement flexible hollow shaft static-unbalance method Download PDFInfo
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- CN103674429B CN103674429B CN201310649863.7A CN201310649863A CN103674429B CN 103674429 B CN103674429 B CN 103674429B CN 201310649863 A CN201310649863 A CN 201310649863A CN 103674429 B CN103674429 B CN 103674429B
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Abstract
The present invention relates to a kind of measurement flexible hollow shaft static-unbalance methods, according to minimum potential energy principal, to there are the flexible hollow shafts of static unbalance, in the opposite direction addition balance quality of its mass eccentricity, balance quality is weighed when tubing is in static balance state, multiplied by balance quality to centre of gyration distance, so that it may find out original static-unbalance.The present invention can accurately measure the static-unbalance of flexible hollow shaft, and principle is simple, easy to operate.In actual production after use, it is successfully realized the measurement of flexible hollow shaft static-unbalance.
Description
Technical field
The present invention relates to a kind of measurement method, especially a kind of measurement flexible hollow shaft static-unbalance method.
Background technique
In flexible helicopter tailing axle system, initial static-unbalance is peculiar and very important technical indicator, is had
The stylish helicopter ground is when developing early period due to not having the initial static unbalance calculation method of pipe and measuring technique, it is unclear that pipe
The mass center and the centre of gyration of base deviate state, cause tail transmission shaft in techniques mistakes such as pipe manufacture, machining and assembly balances
The measures such as static-unbalance correction, compensation cannot be taken in journey, cause tailing axle qualification rate extremely low, and seriously affecting model equipment needs
It asks.
Summary of the invention
The object of the present invention is to provide a kind of measurement flexible hollow shaft static-unbalance methods, measure flexibility to realize
The static unbalance magnitude of hollow shaft reaches to carry out static-unbalance correction and compensation to pipe axis and reduces its static unbalance
The purpose of amount.
It is of the invention the specific steps are：
1. designing and manufacturing a sink, the length of the sink is greater than flexible hollow shaft length, and depth, which is greater than, scratches
The diameter of property hollow shaft；
2. inject water into sink, the depth of water is greater than the diameter of flexible hollow shaft, by the closed at both ends of flexible hollow shaft,
Then flexible hollow shaft closed at both ends is put into screw clamp；
3. marking at the highest point at the middle part of flexible hollow shaft after tubing is static；
4. rotational flexibility hollow shaft unclamps again mark point afterwards downward, existed after flexible hollow shaft is static with marking pen
The highest point midway of flexible hollow shaft makes marks, this process is done at least 3 times repeatedly；
5. if rotor can regard its static-unbalance as zero, can terminate measurement process when any angle is static；
If every time it is static after highest point position consistency, carry out next step；
6. pasting clump weight in the position of mark point；
7. it is rapid to repeat step 4；
8. if carrying out the static unbalance that step 10 carries out calculating flexible rotor suddenly tubing can be static in any angle
Amount increases the clump weight for pasting a quality and last time phase homogenous quantities if highest point is constant when static, if former highest point becomes
When minimum point, then the clump weight quality pasted last time is that the clump weight of its half is replaced；
9. repetition the 4th and step 8 are rapid, if until tubing can be static in any angle；
10. calculating：With the quality for the clump weight being pasted on flexible rotor, the radius multiplied by flexible rotor is flexibility
The static-unbalance of rotor.
The clump weight can be plasticine, and the shape of clump weight is elongated strip shaped.To flexible hollow shaft both ends
When being closed, flexible hollow can be filled in using balloon of the rear diameter greater than flexible hollow shaft internal diameter 20-30mm is blown afloat
Axis both ends.
The final stable state in potential energy minimum of beasurement base minimum potential energy principal of the invention, i.e. object.For flexibility
Hollow shaft, this state are exactly the minimum state of mass center.To there are the flexible hollow shafts of static unbalance, in its mass eccentricity
Opposite direction addition balance quality, i.e. clump weight, the torque caused by torque and mass center of the balance quality to the centre of gyration
When equal, tubing is in static balance state, and flexible hollow shaft can stop at an arbitrary position at this time.Balance quality is weighed, multiplied by
To balance quality to centre of gyration distance, i.e. flexible hollow shaft radius, so that it may find out original static-unbalance.The present invention can be with
The static-unbalance of flexible hollow shaft is accurately measured, principle is simple, easy to operate.In actual production after use, success
The measurement of flexible hollow shaft static-unbalance is realized, the consistency of repeated measurement is fine, has well solved production bottleneck
Problem.
Specific embodiment
A kind of measurement flexible hollow shaft static-unbalance method, the specific steps are that：
1. designing and manufacturing a sink, the length of the sink is greater than flexible hollow shaft length, and depth, which is greater than, scratches
The diameter of property hollow shaft；
2. inject water into sink, the depth of water is greater than the diameter of flexible hollow shaft, by the closed at both ends of flexible hollow shaft,
Then flexible hollow shaft closed at both ends is put into screw clamp；
3. marking at the highest point at the middle part of flexible hollow shaft after tubing is static；
4. rotational flexibility hollow shaft unclamps again mark point afterwards downward, existed after flexible hollow shaft is static with marking pen
The highest point midway of flexible hollow shaft makes marks, this process is done at least 3 times repeatedly；
5. if rotor can regard its static-unbalance as zero, can terminate measurement process when any angle is static；
If every time it is static after highest point position consistency, carry out next step；
6. pasting clump weight in the position of mark point；
7. it is rapid to repeat step 4；
8. if carrying out the static unbalance that step 10 carries out calculating flexible rotor suddenly tubing can be static in any angle
Amount increases the clump weight for pasting a quality and last time phase homogenous quantities if highest point is constant when static, if former highest point becomes
When minimum point, then the clump weight quality pasted last time is that the clump weight of its half is replaced；
9. repetition the 4th and step 8 are rapid, if until tubing can be static in any angle；
10. calculating：With the quality for the clump weight being pasted on flexible rotor, the radius multiplied by flexible rotor is flexibility
The static-unbalance of rotor.
The clump weight can be plasticine, and the shape of clump weight is elongated strip shaped.To flexible hollow shaft both ends
When being closed, flexible hollow can be filled in using balloon of the rear diameter greater than flexible hollow shaft internal diameter 20-30mm is blown afloat
Axis both ends.
Embodiment 1
A piece number is 216# for the flexible tailing axle pipe on helicopter, the length is 3075mm, outer diameter 57mm,
Internal diameter is 50mm, it is desirable that it measures unbalance mass, and calculates its uneven magnitude, the specific steps are that：
1. designing and manufacturing a sink, the length of the sink is 3500mm, depth 80mm；
2. injecting water into sink, depth of water 70mm blows afloat the balloon that rear diameter is 140mm for two and fills in flexibility respectively
In tailing axle pipe, then flexible tailing axle pipe axis is put into screw clamp；
3. marking at the highest point at the middle part of flexible tailing axle pipe after flexible tailing axle pipe is static；
4. rotational flexibility tailing axle pipe unclamps again mark point afterwards downward, existed after flexible tailing axle pipe is static with marking pen
The highest point midway of flexible tailing axle pipe makes marks, this process is done 5 times repeatedly；
5. every time it is static after highest point position consistency, then carry out next step；
6. pasting elongated strip shaped in the position of mark point, quality is the plasticine of 10g；
7. it is rapid to repeat step 4, operated by 5 times repeatedly, observes that the static rear plasticine of flexible tailing axle pipe is still located on
The plasticine that a gross mass is 20g is pasted at tailing axle high point position；
8. it is rapid to repeat step 4, is operated by 5 times repeatedly, observe that plasticine has gone to flexible tailing axle pipe low spot position
It sets, the plasticine of the 20g of stickup is changed to the plasticine of 15g；
9. it is rapid to repeat step 4, operated by 5 times repeatedly, observing plasticine still is flexible tailing axle pipe low dot location, will
The plasticine of the 20g of stickup is changed to the plasticine of 12.5g；
11. it is rapid to repeat step 4, is operated by 5 times repeatedly, observe that flexible tailing axle pipe can be quiet in any angle at this time
Only；
12. calculating：With the quality 12.5g for the clump weight being pasted on flexible tailing axle pipe, multiplied by flexible tailing axle pipe
Radius 57mm/2=28.5mm, the static-unbalance of as flexible tailing axle pipe：12.5g × 28.5mm=356.25gmm.
Claims (4)
1. a kind of measurement flexible hollow shaft static-unbalance method, characterized in that the method includes the following steps：
1) sink is designed and manufactures, the length of the sink is greater than flexible hollow shaft length, and depth is greater than flexible empty
The diameter of heart pipe axis；
2) water is injected into sink, the depth of water is greater than the diameter of flexible hollow shaft, by the closed at both ends of flexible hollow shaft, then
Flexible hollow shaft closed at both ends is put into screw clamp；
3) it after flexible hollow shaft is static, marks at the highest point at the middle part of flexible hollow shaft；
4) rotational flexibility hollow shaft unclamps again mark point afterwards downward, with marking pen in flexibility after flexible hollow shaft is static
The highest point midway of hollow shaft makes marks, this process is done at least 3 times repeatedly；
5) if flexible hollow shaft can regard its static-unbalance as zero, can terminate to measure when any angle is static
Process；If every time it is static after highest point position consistency, carry out next step；
6) clump weight is pasted in the position of mark point；
7) the 4) step is repeated；
If 8) flexible hollow shaft can be static in any angle, carry out the 10) step carry out calculating flexible hollow shaft
Static-unbalance increases the clump weight for pasting a quality and last time phase homogenous quantities if highest point is constant when static, if original is most
When high point becomes minimum point, then the clump weight quality pasted last time is that the clump weight of its half is replaced；
4) and the 8) step 9) the is repeated, if until flexible hollow shaft can be static in any angle；
10) it calculates：With the quality for the clump weight being pasted onto flexible hollow shaft, it is multiplied by the radius of flexible hollow shaft
The static-unbalance of flexible hollow shaft.
2. a kind of measurement flexible hollow shaft static-unbalance method as described in claim 1, characterized in that the counterweight
Block is plasticine.
3. a kind of measurement flexible hollow shaft static-unbalance method as described in claim 1, characterized in that the counterweight
The shape of block is elongated strip shaped.
4. a kind of measurement flexible hollow shaft static-unbalance method as described in claim 1, characterized in that flexible empty
When heart pipe axis both ends are closed, it can be filled in using balloon of the rear diameter greater than flexible hollow shaft internal diameter 20-30mm is blown afloat
Flexible hollow shaft both ends.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201310649863.7A CN103674429B (en) | 2013-12-06 | 2013-12-06 | A kind of measurement flexible hollow shaft static-unbalance method |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201310649863.7A CN103674429B (en) | 2013-12-06 | 2013-12-06 | A kind of measurement flexible hollow shaft static-unbalance method |
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| CN103674429A CN103674429A (en) | 2014-03-26 |
| CN103674429B true CN103674429B (en) | 2018-11-20 |
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Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101504307A (en) * | 2009-03-26 | 2009-08-12 | 北京兆维科技股份有限公司 | Manipulator cantilever weighing apparatus |
| CN101576425A (en) * | 2009-06-18 | 2009-11-11 | 北京理工大学 | Measuring method for static balance of turbine vane wheel and device thereof |
| CN101839791A (en) * | 2010-05-19 | 2010-09-22 | 中国科学院电工研究所 | Uncompleted spherical superconducting rotor air floatation balance measurement method |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE3903814A1 (en) * | 1989-02-09 | 1990-08-16 | Hofmann Gmbh & Co Kg Maschinen | BEARING STAND OF A BALANCING MACHINE BEARING |
| CN2182400Y (en) * | 1992-10-31 | 1994-11-09 | 北京燕山石油化工公司炼油厂 | Magnetic equalizing measuring implement |
| CN202793690U (en) * | 2012-09-04 | 2013-03-13 | 成都市双流金石机械制造有限公司 | Static balance test frame |
-
2013
- 2013-12-06 CN CN201310649863.7A patent/CN103674429B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101504307A (en) * | 2009-03-26 | 2009-08-12 | 北京兆维科技股份有限公司 | Manipulator cantilever weighing apparatus |
| CN101576425A (en) * | 2009-06-18 | 2009-11-11 | 北京理工大学 | Measuring method for static balance of turbine vane wheel and device thereof |
| CN101839791A (en) * | 2010-05-19 | 2010-09-22 | 中国科学院电工研究所 | Uncompleted spherical superconducting rotor air floatation balance measurement method |
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| CN103674429A (en) | 2014-03-26 |
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